Unfortunately I think this is just how things work when it comes to mental health. I had to wait months for my TMS treatment to begin, and now am waiting for a sleep study. I only got ECT quickly because I was self-harming and had suicidal thoughts and went there from inpatient.
I encourage you to think a lot before you get ECT. I hear it works for some people, but for me it did nothing but cause memory issues that make me even less suited to having most jobs than I was before and affect my everyday life.
TMS helped a lot with my depression. I still feel depressed sometimes, but it's not as bad, I'm no longer suicidal, and I've only self-harmed once in the past three months.
CBT may help as well, but it's important to go into it with an open mind. It's much harder to learn the strategies and stuff if you go in assuming it won't work, you have to make sure you put some effort into it for it to do any good. It didn't do much for me because I wasn't in a good mindset for it at the time I had it. But it is also the least invasive and probably least risky option if you're looking at CBT, TMS, or ECT.
I don't know if any of these will help you get a girlfriend - I had all three and haven't ever had a boyfriend - but if any of them will help ease your depression, that will at least make you feel a bit less horrible, and it's entirely possible that you will both have more motivation and look like you're feeling better, both of which can only help. I'm sorry things are taking so long, and I sincerely wish you luck in your quests both to treat your depression and to find a girlfriend.
_________________
Yet in my new wildness and freedom I almost welcome the bitterness of alienage. For although nepenthe has calmed me, I know always that I am an outsider; a stranger in this century and among those who are still men.
-H. P. Lovecraft, "The Outsider"